Orthogonal Multicarrier Division Multiple Access for Multipoint-to-Multipoint Networks

• Published in: IEEE transactions on communications 2013-09, Vol.61 (9), p.3841-3853
• Main Authors: Wenxun Qiu, Tarasak, Poramate, Hlaing Minn
• Format: Article
• Language: English
• Subjects: Access methods and protocols, osi model; Algorithms; Applied sciences; Channels; Complexity theory; Exact sciences and technology; Exact solutions; Frequency division multiplexing; Information, signal and communications theory; Mathematical analysis; Multiaccess communication; multicast; Multicasting; multichannel CSMA/CA; Multiple access; Multiplexing; Multipoint-to-multipoint; Networks; OFDM; Optimal scheduling; Scheduling; Signal and communications theory; Studies; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Throughput; Transmission and modulation (techniques and equipments)
• ISSN: 0090-6778; 1558-0857
• DOI: 10.1109/TCOMM.2013.071813.120704

We develop new transmission schemes for multipoint-to-multipoint (M2M) networks which, unlike the existing approaches, address duplexing/multiplexing and multiple access jointly and possess true M2M characteristics in the physical layer. In the proposed schemes, all forward and reverse links of the M2M network share the overall spectrum concurrently in an orthogonal frequency division manner. This provides increased degrees of freedom and enhanced diversity in scheduling and resource allocation, thus leading to performance enhancement. We first discuss practical implementation issues. Next, we develop our proposed schemes for both centralized and distributed access scenarios. Under the centralized access, we illustrate advantages of the proposed approach for M2M networks using a scheduling algorithm and provide a closed-form analytical throughput upper-bound. Next, we extend the proposed approach to multicasting and present a new scheduling strategy and its closed-form analytical approximate throughput expression. Under the distributed access, we develop a generalized multi-channel carrier sensing multiple access/collision avoidance scheme for M2M networks and propose a new scheme which exploits local channel information. Closed-form analytical throughput expressions for a specific scenario are also presented. Simulation results corroborate substantial performance gains of the proposed schemes over the conventional schemes in both centralized and random access scenarios.